Sodium Lauroyl Hydrolyzed Silk

What is Sodium Lauroyl Hydrolyzed Silk?

Sodium Lauroyl Hydrolyzed Silk is produced by breaking down silk fibroin proteins from silkworm cocoons into smaller peptides, then attaching a lauroyl group derived from lauric acid, typically sourced from coconut or palm. This chemical modification creates an anionic, water-soluble ingredient with surfactant properties. In cosmetics, it appears mainly in hair care products like shampoos and conditioners, as well as skin cleansers and body washes. It works by reducing surface tension to lift dirt and oils into micelles for easy rinsing, while its protein components form a protective film on hair shafts and skin surfaces. This dual action enables effective cleansing alongside conditioning benefits, improving texture without excessive drying. The silk origin provides amino acids that mimic natural hair keratin for compatibility.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Hair conditioning

Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.

Skin conditioning agent

Maintains skin softness, smoothness, and flexibility.

Surfactant

Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.

Cleansing agent

Removes dirt, oil, and impurities by lowering surface tension and forming micelles, enabling soils to be lifted and rinsed away from skin, hair, or teeth.

Antistatic agent

Reduces static electricity and flyaways by improving surface conductivity, enhancing hair manageability and smoothness in conditioners and styling products.

Benefits

Supports hair softness and shine by forming a smoothing film.

Maintains skin flexibility and smoothness during cleansing.

Reduces static buildup for better hair manageability.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit	Who Should Avoid
Individuals with dry or frizzy hair seeking conditioning cleansers.	Those with known allergies to silk proteins.
People with normal to sensitive skin wanting mild surfactants.	People avoiding animal-derived ingredients.
Users of styling products needing antistatic effects.	Individuals sensitive to lauroyl-based surfactants.

Safety Notes

Considered low hazard in cosmetic concentrations per safety assessments.
Non-comedogenic, unlikely to clog pores.

Frequently Asked Questions about Sodium Lauroyl Hydrolyzed Silk

What makes it different from regular hydrolyzed silk?

The lauroyl group adds surfactant abilities for cleansing alongside conditioning.

Is it suitable for daily use?

Yes, its mild nature supports frequent rinse-off applications in hair and skin products.

Does it benefit all hair types?

Particularly helpful for adding shine and reducing static in various hair textures.